Import Error with lxml==5.2.1

[medley56]

Context

User reported an import exception

bash-3.2$ IMAP_DATA_DIR=~/data IMAP_DATA_ACCESS_URL=[https://api.dev.imap-mission.com/](https://nam10.safelinks.protection.outlook.com/?url=https%3A%2F%2Fapi.dev.imap-mission.com%2F&data=05%7C02%7CGavin.Medley%40lasp.colorado.edu%7C70653063081b4142915108de602b8fba%7Cb1ddd7831dbc446b878fa7b03478ea9e%7C1%7C0%7C639053937393044159%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=vpIZV0kIAHqQjyzzalynvc7ZK2zlr3tllHQqTfzqZbQ%3D&reserved=0) IMAP_API_KEY=70bc0c4d2eeea438044a777881464c128689d3627eea31da8b30eeb26541afac imap_cli --instrument hi --data-level l2 --descriptor h90-ena-h-sf-nsp-ram-hae-4deg-1yr --start-date 20260101 --version v999 --dependency imap_hi_l2_test-dependency-json-1yr_20260331_v900.json

Traceback (most recent call last):

  File "/opt/anaconda3/bin/imap_cli", line 5, in <module>

    from imap_processing.cli import main

  File "/Users/dreisen/IMAP/imap_processing/imap_processing/cli.py", line 55, in <module>

    from imap_processing.codice import codice_l1a, codice_l1b, codice_l2

  File "/Users/dreisen/IMAP/imap_processing/imap_processing/codice/codice_l1a.py", line 10, in <module>

    from imap_processing.codice.codice_l1a_de import l1a_direct_event

  File "/Users/dreisen/IMAP/imap_processing/imap_processing/codice/codice_l1a_de.py", line 19, in <module>

    from imap_processing.utils import combine_segmented_packets

  File "/Users/dreisen/IMAP/imap_processing/imap_processing/utils.py", line 10, in <module>

    import space_packet_parser as spp

  File "/opt/anaconda3/lib/python3.12/site-packages/space_packet_parser/__init__.py", line 5, in <module>

    from space_packet_parser.common import SpacePacket

  File "/opt/anaconda3/lib/python3.12/site-packages/space_packet_parser/common.py", line 142, in <module>

    class XmlObject(metaclass=ABCMeta):

  File "/opt/anaconda3/lib/python3.12/site-packages/space_packet_parser/common.py", line 153, in XmlObject

    tree: ElementTree.ElementTree | None,

          ~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~

TypeError: unsupported operand type(s) for |: '_cython_3_0_10.cython_function_or_method' and 'NoneType'

bash-3.2$ pip install --upgrade space_packet_parser

Requirement already satisfied: space_packet_parser in /opt/anaconda3/lib/python3.12/site-packages (6.1.0)

Requirement already satisfied: click>=8.0 in /opt/anaconda3/lib/python3.12/site-packages (from space_packet_parser) (8.1.7)

Requirement already satisfied: lxml>=4.8.0 in /opt/anaconda3/lib/python3.12/site-packages (from space_packet_parser) (5.2.1)

Requirement already satisfied: rich>=13.0 in /opt/anaconda3/lib/python3.12/site-packages (from space_packet_parser) (13.7.1)

Requirement already satisfied: markdown-it-py>=2.2.0 in /opt/anaconda3/lib/python3.12/site-packages (from rich>=13.0->space_packet_parser) (2.2.0)

Requirement already satisfied: pygments<3.0.0,>=2.13.0 in /opt/anaconda3/lib/python3.12/site-packages (from rich>=13.0->space_packet_parser) (2.15.1)

Requirement already satisfied: mdurl~=0.1 in /opt/anaconda3/lib/python3.12/site-packages (from markdown-it-py>=2.2.0->rich>=13.0->space_packet_parser) (0.1.0)

Reproducible Example

Install lxml 5.2.1 (might require building from source during install so needs libz-dev, libxslt-dev and libxml2-dev and gcc

apt-get install libz-dev libxml2-dev libxslt-dev gcc
pip install space_packet_parser==6.0.1
pip install lxml==5.2.1

import space_packet_parser as spp

Fix

Revert the pipe-style (|) comparisons with lxml objects to Unions and add # noqa comments so ruff doesn't complain. Test with lxml versions and update the dependency spec if necessary.